{"id":2615632,"date":"2024-12-30T04:25:32","date_gmt":"2024-12-30T12:25:32","guid":{"rendered":"https:\/\/www.esri.com\/arcgis-blog\/?post_type=blog&p=2615632"},"modified":"2024-12-20T14:04:48","modified_gmt":"2024-12-20T22:04:48","slug":"making-negative-positive-how-to-create-a-cartographic-mask-to-cover-areas-of-nodata","status":"publish","type":"blog","link":"https:\/\/www.esri.com\/arcgis-blog\/products\/arcgis-pro\/mapping\/making-negative-positive-how-to-create-a-cartographic-mask-to-cover-areas-of-nodata","title":{"rendered":"Making Negative Positive – How to create a cartographic mask to cover areas of NoData"},"author":4941,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"open","ping_status":"closed","template":"","format":"standard","meta":{"_acf_changed":false,"_searchwp_excluded":""},"categories":[22941],"tags":[42641,42181,509412,777562,777572],"industry":[],"product":[36581,36551,36561],"class_list":["post-2615632","blog","type-blog","status-publish","format-standard","hentry","category-mapping","tag-arcgis-online","tag-arcgis-pro","tag-mask","tag-nodata","tag-rasters","product-arcgis-living-atlas","product-arcgis-online","product-arcgis-pro"],"acf":{"authors":[{"ID":4941,"user_firstname":"Michael","user_lastname":"Dangermond","nickname":"Michael Dangermond","user_nicename":"mdangermond","display_name":"Michael Dangermond","user_email":"MDangermond@esri.com","user_url":"","user_registered":"2018-03-02 00:16:36","user_description":"Michael Dangermond has over 25 years experience in GIS in such diverse fields as cartography, agriculture, international boundary delineation, environmental protection, regional planning, park planning, land and wildlife conservation, and forestry. He has been working for ESRI since 2010.","user_avatar":""}],"short_description":"How to create a cartographic mask to cover areas of NoData in your web maps.","flexible_content":[{"acf_fc_layout":"content","content":"

To conceal your identity at a masquerade party, you wear a mask. You do the same for your geographic data when you\u2019re making a map.<\/p>\n

When would you want to conceal part of your geographic data? I can explain.<\/p>\n

Sometimes you\u2019re trying to fit some watershed or cool natural shape into a rectangle and there\u2019s these leftover areas of nowhere.<\/p>\n"},{"acf_fc_layout":"image","image":{"ID":2615672,"id":2615672,"title":"Leftover Areas of Nowhere","filename":"leftoverareasofnowhere.png","filesize":597139,"url":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2024\/12\/leftoverareasofnowhere.png","link":"https:\/\/www.esri.com\/arcgis-blog\/products\/arcgis-pro\/mapping\/making-negative-positive-how-to-create-a-cartographic-mask-to-cover-areas-of-nodata\/leftoverareasofnowhere","alt":"This image shows areas that are not covered by data showing up with an undesirable default behavior.","author":"4941","description":"","caption":"","name":"leftoverareasofnowhere","status":"inherit","uploaded_to":2615632,"date":"2024-12-06 18:24:18","modified":"2024-12-06 18:25:35","menu_order":0,"mime_type":"image\/png","type":"image","subtype":"png","icon":"https:\/\/www.esri.com\/arcgis-blog\/wp-includes\/images\/media\/default.png","width":1000,"height":669,"sizes":{"thumbnail":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2024\/12\/leftoverareasofnowhere-213x200.png","thumbnail-width":213,"thumbnail-height":200,"medium":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2024\/12\/leftoverareasofnowhere.png","medium-width":390,"medium-height":261,"medium_large":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2024\/12\/leftoverareasofnowhere.png","medium_large-width":768,"medium_large-height":514,"large":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2024\/12\/leftoverareasofnowhere.png","large-width":1000,"large-height":669,"1536x1536":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2024\/12\/leftoverareasofnowhere.png","1536x1536-width":1000,"1536x1536-height":669,"2048x2048":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2024\/12\/leftoverareasofnowhere.png","2048x2048-width":1000,"2048x2048-height":669,"card_image":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2024\/12\/leftoverareasofnowhere-695x465.png","card_image-width":695,"card_image-height":465,"wide_image":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2024\/12\/leftoverareasofnowhere.png","wide_image-width":1000,"wide_image-height":669}},"image_position":"center","orientation":"horizontal","hyperlink":""},{"acf_fc_layout":"content","content":"

And you want to have some control over how these areas are displayed. But you open the symbology tab and all you have to control these areas is this NoData symbol under the mask tab in the table of contents.<\/p>\n"},{"acf_fc_layout":"image","image":{"ID":2615692,"id":2615692,"title":"No Data Symbol","filename":"NodataThingie4.png","filesize":667981,"url":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2024\/12\/NodataThingie4.png","link":"https:\/\/www.esri.com\/arcgis-blog\/products\/arcgis-pro\/mapping\/making-negative-positive-how-to-create-a-cartographic-mask-to-cover-areas-of-nodata\/nodatathingie4","alt":"This image shows the few options we face when we try to symbolize NoData.","author":"4941","description":"","caption":"","name":"nodatathingie4","status":"inherit","uploaded_to":2615632,"date":"2024-12-06 18:26:30","modified":"2024-12-06 18:27:34","menu_order":0,"mime_type":"image\/png","type":"image","subtype":"png","icon":"https:\/\/www.esri.com\/arcgis-blog\/wp-includes\/images\/media\/default.png","width":1010,"height":220,"sizes":{"thumbnail":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2024\/12\/NodataThingie4-213x200.png","thumbnail-width":213,"thumbnail-height":200,"medium":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2024\/12\/NodataThingie4.png","medium-width":464,"medium-height":101,"medium_large":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2024\/12\/NodataThingie4.png","medium_large-width":768,"medium_large-height":167,"large":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2024\/12\/NodataThingie4.png","large-width":1010,"large-height":220,"1536x1536":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2024\/12\/NodataThingie4.png","1536x1536-width":1010,"1536x1536-height":220,"2048x2048":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2024\/12\/NodataThingie4.png","2048x2048-width":1010,"2048x2048-height":220,"card_image":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2024\/12\/NodataThingie4-826x180.png","card_image-width":826,"card_image-height":180,"wide_image":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2024\/12\/NodataThingie4.png","wide_image-width":1010,"wide_image-height":220}},"image_position":"center","orientation":"horizontal","hyperlink":""},{"acf_fc_layout":"content","content":"

Then you might think: if I had these leftover areas as its own layer I could control it artistically just like I could like any other layer in ArcGIS Pro. I could even upload this to ArcGIS Online, using ArcGIS Image for ArcGIS Online to make a cartographic mask for a web map, and use the blend modes on it to give these parts of my web map a particular appearance.<\/p>\n"},{"acf_fc_layout":"content","content":"

Artists call this negative space, or void. Some art from Asia, like this screen from Japan from the Tokugawa period, includes void as an important part of the piece. Sometimes the void needs as much care as the map subject to really make your map shine.<\/p>\n"},{"acf_fc_layout":"image","image":{"ID":2615962,"id":2615962,"title":"The Four Seasons - Kano Tanu (1602\u20131674)","filename":"TheFourSeasonsKanoTanyu.png","filesize":2052343,"url":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2024\/12\/TheFourSeasonsKanoTanyu.png","link":"https:\/\/www.esri.com\/arcgis-blog\/products\/arcgis-pro\/mapping\/making-negative-positive-how-to-create-a-cartographic-mask-to-cover-areas-of-nodata\/thefourseasonskanotanyu","alt":"Screen: The Four Seasons by Kano Tanyu, an example of zen influence in art inclusive of void","author":"4941","description":"","caption":"The Four Seasons - Kano Tanu (1602\u20131674). An example of inclusion of void in Japanese art, a reflection of Zen influence over their art history","name":"thefourseasonskanotanyu","status":"inherit","uploaded_to":2615632,"date":"2024-12-06 19:03:46","modified":"2024-12-06 19:14:11","menu_order":0,"mime_type":"image\/png","type":"image","subtype":"png","icon":"https:\/\/www.esri.com\/arcgis-blog\/wp-includes\/images\/media\/default.png","width":1200,"height":569,"sizes":{"thumbnail":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2024\/12\/TheFourSeasonsKanoTanyu-213x200.png","thumbnail-width":213,"thumbnail-height":200,"medium":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2024\/12\/TheFourSeasonsKanoTanyu.png","medium-width":464,"medium-height":220,"medium_large":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2024\/12\/TheFourSeasonsKanoTanyu.png","medium_large-width":768,"medium_large-height":364,"large":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2024\/12\/TheFourSeasonsKanoTanyu.png","large-width":1200,"large-height":569,"1536x1536":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2024\/12\/TheFourSeasonsKanoTanyu.png","1536x1536-width":1200,"1536x1536-height":569,"2048x2048":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2024\/12\/TheFourSeasonsKanoTanyu.png","2048x2048-width":1200,"2048x2048-height":569,"card_image":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2024\/12\/TheFourSeasonsKanoTanyu-826x392.png","card_image-width":826,"card_image-height":392,"wide_image":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2024\/12\/TheFourSeasonsKanoTanyu.png","wide_image-width":1200,"wide_image-height":569}},"image_position":"center","orientation":"horizontal","hyperlink":""},{"acf_fc_layout":"content","content":"

What you need to do is make the negative space positive just like any other layer and there\u2019s no magic button for that. At least not yet.<\/p>\n

Don\u2019t worry, we have you covered. I made this instructional video so you can follow the steps to make your own cartographic mask. I show you how to make a mask to represent those areas of NoData, giving the void its own layer that you can overlay or style any way you want.<\/p>\n"},{"acf_fc_layout":"kaltura","video_id":"1_pflcafr4","time":false,"start":0,"stop":""},{"acf_fc_layout":"content","content":"

Happy creating!<\/p>\n"}],"related_articles":[{"ID":2635302,"post_author":"8492","post_date":"2024-12-20 11:55:26","post_date_gmt":"2024-12-20 19:55:26","post_content":"","post_title":"Explore the Global Wind Atlas","post_excerpt":"","post_status":"publish","comment_status":"open","ping_status":"closed","post_password":"","post_name":"global-wind-atlas","to_ping":"","pinged":"","post_modified":"2024-12-20 13:43:11","post_modified_gmt":"2024-12-20 21:43:11","post_content_filtered":"","post_parent":0,"guid":"https:\/\/www.esri.com\/arcgis-blog\/?post_type=blog&p=2635302","menu_order":0,"post_type":"blog","post_mime_type":"","comment_count":"0","filter":"raw"}],"show_article_image":false,"card_image":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2024\/12\/void_card.png","wide_image":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2024\/12\/void_banner.png"},"yoast_head":"\nMaking Negative Positive - How to create a cartographic mask to cover areas of NoData How to make a cartographic mask to control negative space in your web maps. %<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.esri.com\/arcgis-blog\/products\/arcgis-pro\/mapping\/making-negative-positive-how-to-create-a-cartographic-mask-to-cover-areas-of-nodata\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Making Negative Positive - 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